H-Sphere should be able to handle hundreds of thousands and even millions of accounts. However, too many resellers may generate high control panel load.

How many accounts can a stand-alone H-Sphere web server handle?

cpwebhosting.net have customers with stand-alone web servers hosting thousands of accounts. However, the server will not be able to service as many users if they are actively using cgi or other scripts, if they have high hit rates, or if you host too many resellers.

What are the limitations to H-Sphere?

There are no hard limitations that we are aware of. The software scales well to the physical limits of the hardware.